PHP Fatal error: Uncaught Error

Hi. We receive the following fatal error and it makes our website loose the CSS. I have to clear the site cache and it usually gets back up in 20 minutes or so. This has happened probably 20 times in the past year. (I’ve removed my company URL below and replaced it with XYZ). The other plugin in the mix is from Wicket, and they said the error isn’t from them. Any help would be greatly appreciated. Thanks in advance.

2023/06/28 14:16:20 [error] 78741#78741: *7879629 FastCGI sent in stderr: “PHP message: PHP Fatal error: Uncaught Error: Call to undefined function industrial_logger() in /www/XYZ/public/wp-content/plugins/wicket-wordpressplugin-php/wicket_cas_role_sync.php:23

Stack trace:

#0 /www/XYZ/public/wp-includes/class-wp-hook.php(308): custom_action_before_auth_user_wordpress(Array)

#1 /www/XYZ/public/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(”, Array)

#2 /www/XYZ/public/wp-includes/plugin.php(517): WP_Hook->do_action(Array)

#3 /www/XYZ/public/wp-content/plugins/wp-cassify/classes/wp_cassify_plugin.php(529): do_action(‘wp_cassify_befo…’, Array)

#4 /www/XYZ/public/wp-includes/class-wp-hook.php(308): wp_cassify\WP_Cassify_Plugin->wp_cassify_grab_service_ticket(”)

#5 /www/XYZ/public/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)

#6 /www/” while reading response header from upstream, client: 73.223.134.8, server: xyz.org, request: “GET /?ticket=ST-1721-QhIvBBhta4uFXHNDK86cgKg7gkw-ip-172-31-3-73 HTTP/2.0”, upstream: “fastcgi://unix:/var/run/php8.0-fpm-xyz.sock:”, host: “xyz.org:27801”